#include <stdio.h>
int main()
{
    int num1,num2;
    printf("Please enter a year:");
    scanf("%d",&num1);
    num2=num1;
    num1=(num1)%4;
    num2=(num2)%100;
    if(num1==0&&num2!=0)
    printf("This is a leap year.");
    else
    printf("This is not a leap year.");
    return(0);
}